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Nanophase separated,grafted alternate copolymer styrene-maleic anhydride as an efficient room temperature solid state lithium ion conductor

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Chinese Chemical Letters 2024年第7期35卷 491-496页

作者： Qian Wang Ting Gao Xiwen Lu Hangchao Wang Minggui Xu Longtao Ren zheng chang Wen Liu Institute of Science and Technology China Three Gorges CorporationBeijing 100038China State Key Laboratory of Chemical Resource Engineering Beijing Advanced Innovation Center for Soft Matter Science and EngineeringCollege of ChemistryBeijing University of Chemical TechnologyBeijing 100029China

All solid-state lithium metal batteries(ASSLMBs)based on polymer solid electrolyte and lithium metal anode have attracted much attention due to their high energy density and intrinsic ***,the low ionic conductivity at room temperature and poor mechanical properties of the solid polymer electrolyte result in increased polarization and poor cycling stability of the Li metal *** order to improve the ionic conductivity at room temperature while maintaining mechanical strength,we combine the conductivity of short chain polyethylene oxide(PEO)and strength of styrene-maleic anhydride copolymer(SMA)to obtain a grafted block copolymer with nanophase separation structure,which has room temperature ionic conductivity up to 1.14×10^(-4)S/cm and tensile strength up to 1.4 ***||Li symmetric cell can work stably for more than 1500 h under the condition of 0.1 mA/cm^(2).Li||LiFePO_(4)full cells can deliver a high capacity of 151.4 mAh/g at 25℃and 0.2 C/0.2 C charge/discharge conditions,showing 85.6%capacity retention after 400 ***,the all solid state Li||LiFePO_(4)pouch cell shows excellent safety performance under different abuse *** results demonstrate that the nanophase separated,grafted alternate copolymer electrolyte has huge potential for application in Li metal batteries.

关键词： Solid polymer electrolyte All solid-state battery Li metal battery Copolymers Nanophase separation

Precise Determination of the Bottom-Quark On-Shell Mass Using Its Four-Loop Relation to the■-Scheme Running Mass

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Chinese Physics Letters 2024年第10期41卷 26-30页

作者： Shun-Yue Ma Xu-Dong Huang Xu-chang zheng Xing-Gang Wu Department of Physics Chongqing Key Laboratory for Strongly Coupled PhysicsChongqing UniversityChongqing 401331China College of Physics and Electronic Engineering Chongqing Normal UniversityChongqing 401331China

We explore the properties of the bottom-quark on-shell mass(Mb)by using its relation to the■mass■.At present,this■-on-shell relation has been known up to four-loop QCD corrections,which however still has a~2%scale ... 详细信息

关键词： correction quark relation

Clinical characteristics of peripapillary hyperreflective ovoid mass-like structures in myopic children

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International Journal of Ophthalmology(English edition) 2024年第7期17卷 1292-1299页

作者： Lu Zhang Zuo-Hui-Zi Yi Xuan Jiang Gong-Peng Sun Fang Zhao Li Zhang Yi Xiang chang-zheng Chen Department of Ophthalmology the Central Hospital of WuhanTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430014Hubei ProvinceChina Eye Center Renmin Hospital of Wuhan UniversityWuhan 430060Hubei ProvinceChina

AIM:To describe the characteristics of peripapillary hyperreflective ovoid mass-like structure(PHOMS)in myopic children and to investigate factors associated with ***:This retrospective observational study included 101 eyes of 101 children(age≤17y)with *** included patients underwent comprehensive clinical *** nerve canal parameters,including disc diameter,optic nerve head(ONH)tilt angle,and border tissue angle were measured using serial enhanced-depth imaging spectral-domain optical coherence tomography(EDI-OCT).Based on the optic disc drusen consortium’s definition of PHOMS,eyes were classified as PHOMS group and non-PHOMS *** was categorized according to ***:Sixty-seven(66.3%)eyes were found with *** PHOMS could only be detected by optical coherence tomography(OCT).Medium PHOMS could be seen with blurred optic disc borders corresponding to *** most frequent location of PHOMS was at the nasosuperior(91%,61 of 67 eyes)to ONH *** axial length and spherical equivalent were more myopic in the PHOMS group than in the non-PHOMS group(both Pchanges in ONH caused by axial elongation facilitated an understanding of the mechanism of PHOMS.

关键词： peripapillary hyperreflective ovoid masslike structure myopia optic disc edema enhanced-depth imaging spectral-domain optical coherence tomography

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层状地基中海洋大直径管桩水平动力响应分析

岩土力学 2024年第6期45卷 1873-1883页

作者：林浩郑长杰丁选明福建理工大学福建省土木工程新技术与信息化重点实验室福建福州350118 福建理工大学土木工程学院福建福州350118 重庆大学土木工程学院重庆400045

考虑桩−海水−层状土相互作用,研究了水平动荷载作用下层状地基中海洋大直径管桩的动力响应特性。将海水视为无黏性可压缩流体介质建立桩周、桩芯海水的运动方程,通过分离变量法并结合海水的边界条件求得桩周、桩芯海水作用在管桩上的动... 详细信息

考虑桩−海水−层状土相互作用,研究了水平动荷载作用下层状地基中海洋大直径管桩的动力响应特性。将海水视为无黏性可压缩流体介质建立桩周、桩芯海水的运动方程,通过分离变量法并结合海水的边界条件求得桩周、桩芯海水作用在管桩上的动水压力。将海床土体视为黏弹性介质并考虑其成层非均质性,利用微分变化并结合土体振动边界条件解得桩周、桩芯土体作用在管桩上的水平抗力。进而根据各桩段上水平力的平衡建立管桩控制方程,利用传递矩阵法并结合桩身的连续条件以及桩顶、桩底的边界条件,得到层状海床土中海洋大直径管桩的水平动力响应解析解,给出了桩顶位移解析表达式。将所得解与有限元模拟结果以及退化解与已有文献解进行对比,验证了本研究计算方法的合理性。并基于所得解分析了管桩−海水−层状土系统水平动力响应对动水压力、水深、土体模量、土层厚度等关键参数的敏感性。

关键词：桩顶位移海洋大直径管桩水平振动特性桩芯海水层状海床地基

Combined effect of cortical superficial siderosis and cerebral microbleed on short-term and long-term outcomes after intracerebral haemorrhage

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Stroke & Vascular Neurology 2024年第4期9卷 429-438,I0131-I0146页

作者： Yujia Jin Yu-hui Huang Yu-ping Chen Yao-dan Zhang Jiawen Li Kai-cheng Yang Xianghua Ye Lu-hang Jin Jian Wu chang-zheng Yuan Feng Gao Lu-sha Tong Neurology Department The Second Affiliated Hospital of Zhejiang UniversitySchool of MedicineHangzhouChina School of Public Health Zhejiang UniversityHangzhouChina Department of Neurology Tiantai People's Hospital of Zhejiang ProvinceTaizhouChina

Background and purpose Cortical superficial siderosis(cSS)and cerebral microbleed(CMB)have distinct effects on intracerebral haemorrhage(ICH).We aim to investigate the combined effect of cSS and CMB on outcomes after *** Based on a single-centre stroke registry database,patients with spontaneous ICH who had CT scan within 48 hours after ictus and MRI subsequently were *** patients were divided into four groups(cSS-CMB−,cSS-CMB+,cSS+CMB−,cSS+CMB+)according to cSS and CMB on susceptibility-weighted image of *** outcomes were haematoma volume on admission and unfavourable outcome defined as modified Rankin Scale scores≥3 at 3 *** outcomes were all-cause death,recurrence of stroke and ICH during follow-up(median follow-up 2.0 years,IQR 1.0-3.0 years).Results A total of 673 patients were identified from 1044 patients with spontaneous ICH.131(19.5%)had cSS and 468(69.5%)had *** with cSS+CMB+had the highest rate of poor outcome at 3 months,as well as all-cause death,recurrent stroke and ICH during *** cSS−patients,CMB was associated with smaller haematoma(β−0.13;95%CI−0.22 to−0.03;p=0.009),but it still increased risks of recurrent ICH(OR 4.6;95%CI 1.3 to 15.6;p=0.015)and stroke(OR 2.0;95%CI 1.0 to 4.0;p=0.049).These effects of CMB became unremarkable in the context of cSS+.Conclusions Patients with different combinations of cSS and CMB have distinct patterns of short-term and long-term *** CMB is related to restrained haematoma,it does not improve long-term outcomes.

关键词： superficial cerebral effect

敦煌医药写本P.4038与羽043草书考辨五则

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古汉语研究 2024年第1期 36-47,126,127页

作者：吴昌政浙江大学汉语史研究中心/文学院浙江杭州310058

法藏敦煌写本P.4038与日藏敦煌写本羽043的形制、内容、体例及字迹相类,原本当属同一件医药文书。目前学界对其校录注释已相对完善,但由于原卷多以行草书写就,部分字形简省难辨,加之敦煌医药文献语言成分复杂,诸家校释仍有可商可补之处... 详细信息

法藏敦煌写本P.4038与日藏敦煌写本羽043的形制、内容、体例及字迹相类,原本当属同一件医药文书。目前学界对其校录注释已相对完善,但由于原卷多以行草书写就,部分字形简省难辨,加之敦煌医药文献语言成分复杂,诸家校释仍有可商可补之处。文章综合字形与文意文例,联系相关出土与传世文献,对其中“■”“■”“■”“■”“■”等疑难字形进行考辨分析,指出这两件医药写本在汉字史与汉语词汇史研究上的价值,并就涉及的草书写本校释问题试作讨论。

关键词：敦煌写本医药文献 P.4038 羽043 草书

Pd/WO_(3)催化剂的合成及其催化糠醛选择性加氢性能研究

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现代化工 2024年第6期44卷 156-160页

作者：常德政高岩河南省冶金研究所有限责任公司河南郑州450053 河南省冶金余热固废资源利用工程技术研究中心河南郑州450053

糠醛是木制纤维素的水解产物,由于其分子结构中含有多个官能团且官能团的结构异常敏感,糠醛选择性催化加氢可制得2-甲基呋喃、糠醇、四氢糠醇、呋喃、四氢呋喃等一系列高附加值化学品。因此,制备了一种高活性、高选择性(四氢糠醇)、稳... 详细信息

糠醛是木制纤维素的水解产物,由于其分子结构中含有多个官能团且官能团的结构异常敏感,糠醛选择性催化加氢可制得2-甲基呋喃、糠醇、四氢糠醇、呋喃、四氢呋喃等一系列高附加值化学品。因此,制备了一种高活性、高选择性(四氢糠醇)、稳定性好及贵金属负载量低的负载型催化剂。采用硼氢化钠液相化学还原法合成了具有不同Pd负载量的Pd/WO_(3)催化剂(0.34%、2.0%和4.5%),考察了Pd的负载量及反应温度对Pd/WO_(3)催化糠醛选择性加氢的影响,结果表明,最佳反应条件为:2.0%Pd、反应时间为2 h、反应温度为150℃,此时糠醛转化率为99.0%,四氢糠醇选择性达92.2%。低温反应(100℃)时升高Pd负载量有利于提高催化剂性能,高温反应(150℃)时Pd最佳负载量为2.0%。

关键词：糠醛选择性加氢 Pd/WO_(3) 高分散

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基于结构化视角的高中化学教材分析

东北师大学报（哲学社会科学版） 2024年第4期 73-81页

作者：单媛媛郑长龙东北师范大学化学教育研究所吉林长春130024

课程内容结构化整合是基础教育课程改革的重要理念,这种变革同样预示着教材研究视角和思路的转变。本研究以化学课程标准中结构化视角和科学哲学为理论依据,构建了包含5个一级编码和17个二级编码的化学教材编码系统,以人教版高中化学教... 详细信息

课程内容结构化整合是基础教育课程改革的重要理念,这种变革同样预示着教材研究视角和思路的转变。本研究以化学课程标准中结构化视角和科学哲学为理论依据,构建了包含5个一级编码和17个二级编码的化学教材编码系统,以人教版高中化学教材为研究对象,对其落实新课标课程内容化理念的内在内容特点和外在编排特点进行分析。研究结果表明,编码系统能有效揭示化学教材的结构化特点,为大概念、核心知识、基本思路与方法、重要态度及重要实践活动等要素提供一个全面的分析框架。人教版化学教材通过多种方式协同实现课程内容结构化,不仅深入贯彻了新课标的教育理念和规定要求,而且在转化实践中展现了独特的优势。未来研究应深度理解“课程化”过程中内容结构化课程理念,加强关注“教材化”过程中教材与课标的一致性,持续分析“教学化”过程中教师教学反馈性评价。

关键词：结构化 BCMAP 高中化学化学教材

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高中生“反应因果关系”思维水平测量工具的开发

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化学教育（中英文） 2024年第7期45卷 83-90页

作者：芦峰迟铭郑长龙东北师范大学教师教育研究院吉林长春130024

在塔兰克搭建的概念构造图的基础上,抽提出高中生“反应因果关系”大概念下的思维水平,发现学生思维水平越高,其回答模式对化学问题的解释力越强。思维水平较低的学生倾向于采用线性因果关系或单一因素来解释化学问题,而思维水平较高的... 详细信息

在塔兰克搭建的概念构造图的基础上,抽提出高中生“反应因果关系”大概念下的思维水平,发现学生思维水平越高,其回答模式对化学问题的解释力越强。思维水平较低的学生倾向于采用线性因果关系或单一因素来解释化学问题,而思维水平较高的学生更倾向于采用目的论或结构化的思维模式来解释化学问题。以高中生“反应因果关系”大概念下的思维水平为框架,基于部分计分Rasch模型(Partial credit Rasch model),运用布里格斯提出的定序多项选择项目,开发高中生“反应因果关系”思维水平测量工具,工具结构效度与信度良好。

关键词：定序多项选择概念构造图反应因果关系思维水平